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Summary
The max-width
property is used to set the maximum width of a given element. It prevents the used value of the width
property from becoming larger than the value specified for max-width
.
max-width
overrides width
, but min-width
overrides max-width
.
Initial value | none |
---|---|
Applies to | all elements but non-replaced inline elements, table rows, and row groups |
Inherited | no |
Percentages | refer to the width of the containing block |
Media | visual |
Computed value | the percentage as specified or the absolute length or none |
Animatable | yes, as a length, percentage or calc(); when both values are lengths, they are interpolated as lengths; when both values are percentages, they are interpolated as percentages; otherwise, both values are converted into a calc() function that is the sum of a length and a percentage (each possibly zero), and these calc() functions have each half interpolated as real numbers. |
Canonical order | the unique non-ambiguous order defined by the formal grammar |
Syntax
/* <length> value */ max-width: 3.5em; /* <percentage> value */ max-width: 75%; /* Keyword values */ max-width: none; max-width: max-content; max-width: min-content; max-width: fit-content; max-width: fill-available; /* Global values */ max-width: inherit; max-width: initial; max-width: unset;
Values
none
- The width has no maximum value.
<length>
- See
<length>
for possible units. <percentage>
- Specified as a
<percentage>
of containing block's width. max-content
- The intrinsic preferred width.
min-content
- The intrinsic minimum width.
fill-available
- The containing block width minus horizontal margin, border, and padding. Some browsers implement an ancient name for this keyword,
available
. fit-content
- The same as
max-content.
Formal syntax
<length> | <percentage> | none | max-content | min-content | fit-content | fill-available
Examples
In this example, the "child" <div> has its width property set so that it will use the full width of the parent <div> but the max-width property constrains its width to 150px.
<div id="parent"> <div id="child"> The Mozilla community produces a lot of great software. </div> </div>
#parent { width: 300px; } #child { background: gold; width: 100%; max-width: 150px; }
The fit-content value can be used to set the width of an element based on the intrinsic size required by its content:
#parent { background: lightblue; width: 300px; } #child { background: gold; width: 100%; max-width: -moz-fit-content; max-width: -webkit-fit-content; }
Specifications
Specification | Status | Comment |
---|---|---|
CSS Intrinsic & Extrinsic Sizing Module Level 3 The definition of 'max-width' in that specification. |
Working Draft | Adds the max-content , min-content , fit-content , and fill-available keywords.Both CSS3 Box and CSS3 Writing Modes drafts defined at some point these keywords. These drafts are superseded by this spec. |
CSS Transitions The definition of 'max-width' in that specification. |
Working Draft | Defines max-width as animatable. |
CSS Level 2 (Revision 1) The definition of 'max-width' in that specification. |
Recommendation | Initial definition |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 1.0 | 1.0 (1.7 or earlier) | 7.0 | 4.0 | 2.0.2 (416), buggy before |
applies to <table> [1] |
No support | (Yes) | No support | (Yes) | No support |
max-content , min-content , fit-content , and fill- available |
No support [3] | 3.0 (1.9)-moz [2] | No support | No support | No support [3] |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | ? | ? | ? | ? | ? |
[1] CSS 2.1 explicitly leaves the behavior of max-width
with <table>
undefined. Therefore any behavior is CSS2.1-compliant; newer CSS specifications may define this behavior, so Web developers shouldn't rely on a specific one now.
[2] Gecko experimentally implements the definitions given in CSS3 Basic Box. This one defines available
and not fill-available
. Also the definition of fit-content
is simpler than in CSS3 Sizing.
[3] WebKit implements an earlier proposal for setting the height to an intrinsic height: the keywords intrinsic
, instead of max-content
, and min-intrinsic
, instead of min-content
There is no equivalent for fill-available
or fit-content
.